[GCM] Extracting GCMConnectionObserver from GCMAppHandler

components/gcm_driver/gcm_driver_android.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H
 #define COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H
 
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
@@ skipping 29 matching lines @@
                          jobject obj,
                          jstring app_id);
 
   // Register JNI methods.
   static bool RegisterBindings(JNIEnv* env);
 
   // GCMDriver implementation:
   virtual void OnSignedIn() OVERRIDE;
   virtual void Purge() OVERRIDE;
   virtual void Enable() OVERRIDE;
+  virtual void AddConnectionObserver(GCMConnectionObserver* observer) OVERRIDE;
+  virtual void RemoveConnectionObserver(
+      GCMConnectionObserver* observer) OVERRIDE;
   virtual void Disable() OVERRIDE;
   virtual GCMClient* GetGCMClientForTesting() const OVERRIDE;
   virtual bool IsStarted() const OVERRIDE;
   virtual bool IsConnected() const OVERRIDE;
   virtual void GetGCMStatistics(const GetGCMStatisticsCallback& callback,
                                 bool clear_logs) OVERRIDE;
   virtual void SetGCMRecording(const GetGCMStatisticsCallback& callback,
                                bool recording) OVERRIDE;
   virtual void UpdateAccountMapping(
       const AccountMapping& account_mapping) OVERRIDE;
@@ skipping 12 matching lines @@
 
  private:
   base::android::ScopedJavaGlobalRef<jobject> java_ref_;
 
   DISALLOW_COPY_AND_ASSIGN(GCMDriverAndroid);
 };
 
 }  // namespace gcm
 
 #endif  // COMPONENTS_GCM_DRIVER_GCM_DRIVER_ANDROID_H